Help Is it possible to just have an weird resistance to chemicals?

[Warlord's Pulse]

Caffeine don't do shit on me, melatonin don't do shit on me, teas, overall medications like painkillers, and even Methylphenidate didn't do shit on me
Wtf

 

[Yavannah]

you are probably whats called an ,,ultra rapid metabolizer''
its caused by a polymorphism of CYP2D6 liver enzymes.
meaning you genetically have more copies of a specific liver enzymes family causing you to break down medication and other substances super fast without reaching a therapeutic dose.

 

[Warlord's Pulse]

you are probably whats called an ,,ultra rapid metabolizer''
its caused by a polymorphism of CYP2D6 liver enzymes.
meaning you genetically have more copies of a specific liver enzymes family causing you to break down medication and other substances super fast without reaching a therapeutic dose.

First time I'm hearing that, but it makes sense